<div id="collection">
  <input type="checkbox" name="toggle_all" class="toggle_all" value="">

  <input type="checkbox" name="item1" id="item_1" value="1">
  <input type="checkbox" name="item2" id="item_2" value="2">
  <input type="checkbox" name="item3" id="item_3" value="3">
  <input type="checkbox" name="item4" id="item_4" value="4">
</div>

